One of the most sought-after events in the history of mixed martial arts is about to kick off from the T-Mobile Arena in Las Vegas, Nevada this Saturday night – and UFC 229 is bringing a pair of surging heavyweights looking to make a title run, a set of former champs looking to challenge once again – but the PPV will be capped off with a lightweight title fight involving an unstoppable force versus an immovable object.

The main event will see the current UFC lightweight king Khabib Nurmagomedov defend his throne against the always-polarizing superstar Conor McGregor. The former champ McGregor hasn’t competed inside of an Octagon since November of 2016. Will the undefeated champion reign supreme, or will McGregor reclaim the gold that he never really lost?

Speaking of lost gold, the co-main event has stripped-interim lightweight champion Tony Ferguson making his return to competition, following a nasty leg injury, when he takes on fellow former champion Anthony Pettis. Is Ferguson close to 100% healthy and ready to go, or might a premature comeback be just the opening Pettis needs to start another march towards contention.

Before that, a clash of top-15 light heavyweights is on deck when the #7 ranked Ovince Saint. Preux takes on the #12 ranked Dominick Reyes. And then we have top-5 heavyweights in the queue as #2 Derrick Lewis squares off with #5 Alexander Volkov. Which big man will continue their trajectory towards a heavyweight title shot?

Opening up the PPV main card, the 15-6 Michelle Waterson locks horns with the 14-7 Felice Herrig in a strawweight contest.

The FS1 Prelim card starts at 8:00pm ET and the featured bout there will be a top-shelf flyweight fight between Sergio Pettis and Jussier Formiga. The rest of this portion of the prelims include bouts between welterweights Vicente Luque and Jalin Turner, women’s bantamweights Tonya Evinger and Aspen Ladd, and then lightweights Alan Patrick and Scott Holtzman.

The UFC early Fight Pass prelims, which start at 6:30pm ET, has three bouts lined up and will be anchored by women’s bantamweights Yana Kunitskaya and Lina Lansberg. The remaining two Fight Pass bouts include lightweights Nik Lentz and Gray Maynard, and then welterweights Ryan LaFlare and Tony Martin.